Horse tethering support



FIG. 1 is a side elevational view of a horse tethering support showing our new design, the opposite side being a mirror image of the side shown;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a horse tethering support, substantially as shown and described. 